Commit be54c121 authored Aug 21, 2018 by Anton Blanchard Committed by Michael Ellerman Sep 17, 2018

powerpc/64: Remove static branch hints from memset()



Static branch hints override dynamic branch prediction on recent
POWER CPUs. We should only use them when we are overwhelmingly
sure of the direction.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent ba2dd8a2

arch/powerpc/lib/mem_64.S

+2 −2

Original line number	Diff line number	Diff line
		@@ -40,7 +40,7 @@ _GLOBAL(memset)
		.Lms: PPC_MTOCRF(1,r0)
		mr r6,r3
		blt cr1,8f
		beq+ 3f /* if already 8-byte aligned */
		beq 3f /* if already 8-byte aligned */
		subf r5,r0,r5
		bf 31,1f
		stb r4,0(r6)
		@@ -85,7 +85,7 @@ _GLOBAL(memset)
		addi r6,r6,8
		8: cmpwi r5,0
		PPC_MTOCRF(1,r5)
		beqlr+
		beqlr
		bf 29,9f
		stw r4,0(r6)
		addi r6,r6,4

Admin message